JPH0339136Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric fryer that fries food by heating cooking oil for frying with a heater.

[Conventional technology]

Generally, an electric fryer for frying food is constructed as shown in FIG. 3, for example. In the figure, 1 is an oil tank, 2 is a discharge pipe for discharging cooking oil in the oil tank 1 connected to the lower end of the oil tank 1, and 3 is rotatably provided at the upper end of the discharge pipe 2, and is connected to the lower end of the oil tank 1. The operating rod 4 is a main heater placed near the center of the oil tank 1, which opens and closes a discharge valve that can be opened and closed freely. Cooking oil 5 for frying consisting of solid oil injected into the container is heated.

When the heater 4 is energized, the heat of the heater 4 causes a convection of the oil 5 in the oil tank 1 as shown by the arrow in FIG. 3, and the convection heats the oil 5 in the oil tank 1 to a predetermined temperature. The food is then immersed in the heated oil 5 to fry the food.

By the way, since the heater 4 is disposed near the center of the oil tank 1, only the oil 5 in the upper half of the oil tank 1 is heated. Since the food is fried many times, convection of the oil 5 is prevented from occurring at the lower end of the oil tank 1, and sediments generated from the food being cooked are deposited at the lower end of the oil tank 1, which is called a cold zone. In order to suppress the deterioration of the oil 5 and at the same time to prevent deposits from adhering to the food again due to the convection of the oil 5 and spoiling the finish of the food, the heater 4 is installed.
is arranged near the center of the oil tank 1.

[Problem that the invention attempts to solve]

However, as mentioned above, since the cold zone, that is, the oil 5 at the lower end of the oil tank 1 is not heated by the heater 4, the oil 5 at the lower end of the oil tank 1 solidifies even during cooking, especially when the oil tank 1 and the pipe The closer you get to the connecting part with the heater 4, the more difficult it is for the heat of the heater 4 to be transmitted and the solidification of the oil 5 progresses. , the upper end of the pipe 2 is blocked by the solidified oil 5 at the lower end of the oil tank 1, causing the inconvenience that the oil 5 in the oil tank 1 cannot be discharged.

Conventionally, the solidified oil 5 in the oil tank 1 is forced into the pipe 2 using a rod or the like to forcibly form a communication path that communicates the inside of the oil tank 1 and the pipe 2, but this method is very time-consuming. Moreover, since it is necessary to carry out the above-mentioned pushing operation before the upper layer of oil 5 solidifies, there is a problem that there is a high risk that the operator will be burned by the residual heat of the oil 5.

[Means for solving problems]

This invention was made with the above-mentioned points in mind and made it possible to easily drain the cooking oil in the oil tank, and includes an oil tank into which frying oil is poured,
A main heater disposed near the center of the oil tank to heat the cooking oil in the oil tank, an auxiliary heater wrapped around the lower end of the outer periphery of the oil tank, and the auxiliary heater connected to an AC power source when draining the oil. This is an electric fryer equipped with a means for

[Effect]

When draining oil, an auxiliary heater wrapped around the lower edge of the oil tank is connected to an AC power source, and when draining oil, the solidified cooking oil at the bottom of the oil tank is heated and melted by the auxiliary heater, and the inside of the oil tank is heated and melted. Cooking oil is drained.

〔Example〕

Next, this invention will be explained with reference to FIGS. 1 and 2 showing one embodiment thereof.

First, in Fig. 1 showing the external appearance, the same symbols as in Fig. 3 indicate the same or equivalent items, 6 is the fryer body case that houses the oil tank 1 and the heater power control circuit, etc., and 7 is the case. 6 is a door formed from the left end to the center of the upper half of the oil tank 1, which is closed and openable; 8 is a handle provided at the right end of the door 7; 9 is the top of the case 6; An operation panel is provided at the half-right end and includes a cooking switch ON/OFF control knob 10 (to be described later), etc., and 11 is an auxiliary heater, which is wrapped around the lower end of the outer periphery of the oil tank 1 and the upper end of the discharge pipe 2. Case 6, door 7, knob 10, oil tank 1,
An electric fryer 12 is constituted by the pipe 2, the operating rod 3, and the auxiliary heater 11.

Next, FIG. 2 showing the configuration of the energization control circuit will be explained.

In the same figure, 13a, 13b, 13c are three-phase
The first connected to a 200V AC power supply (not shown)
- A third power terminal 14 is connected to the first power terminal 13a, and a switching piece 14c that switches between the first contact 14a on the inlet side and the second contact 14b on the out side is connected to the first power terminal 13a, and the main heater 4
and a cooking switch as a changeover switch for selectively connecting the auxiliary heater 11 to the AC power source; 15 is a thermo contact of an oil temperature adjusting thermostat whose one end is connected to the first contact 14a of the switch 14; 16;
is a first electromagnetic contactor whose both ends are connected to the other end of the thermocontact 15 and the third power terminal 13c, and one end of the two normally open contacts 16', 16'' of the contactor 16 are connected to the first, It is connected to the third power supply terminals 13a, 13c, and the other end of both normally open contacts 16', 16'' and the second
The main heater 4 is connected between the power terminal 13b and the power terminal 13b.
The first and second heater coils 17a, 17 that constitute the
b is provided.

18 is a delay relay whose both ends are connected to the second contact 14b and third power terminal 13c of the switch 14 and whose one end is connected to the second contact 14b of the switch 14, and 19 is a delay relay whose both ends are connected to the second contact 14b of the switch 14. A second electromagnetic contactor is connected to the other end of the contact 18' and the third power terminal 13c, and one end of the normally open contact 19' is connected to the first power terminal 13a, and the other end of the normally open contact 19' is connected to the first power terminal 13a. The auxiliary heater 11 is provided between the third power supply terminal 13c and the energization control circuit 20 is configured by the circuit shown in FIG.

Next, the operation of the embodiment will be explained.

Now, turn knob 10 to the on side and turn switch 1.
When the switching piece 14c of No. 4 is switched and connected to the first contact 14a, current from the AC power supply flows through the switch 14 and the thermocontact 15 to the first electromagnetic contactor 16, and the first electromagnetic contactor 16 is excited. Contactor 16
Both normally open contacts 16', 16'' are turned on, and both heater coils 17a, 17b of main heater 4 are connected to both normally open contacts 16', 16'' and each power terminal 13a to 13c.
The main heater 4 is connected to the alternating current power source through the main heater 4, and a current from the alternating current power source is passed through the main heater 4 to heat the cooking oil 5 in the oil tank 1 to a predetermined temperature, and the food immersed in the oil 5. Fried food is prepared. Note that the thermostat repeatedly turns on and off the thermocontact 15 to cut off and cut off the supply of electricity to the main heater 4, thereby heating and maintaining the oil 5 at a predetermined temperature.

Next, when the food is finished frying, the knob 1
0 to the cut side and the switching piece 14c of the switch 14
When connected to the second contact 14b, the excitation of the first electromagnetic contactor 16 is stopped and both normally open contacts 16',
16'' is turned off, power supply to both heater coils 17a and 17b of the main heater 4 is stopped, and heating of the cooking oil 5 in the oil tank 1 by the main heater 4 is stopped.

On the other hand, due to the switching connection of the switching piece 14c of the switch 14 to the second contact 14b, current from the AC power supply flows to the relay 18 via the switch 14, and the switch 14 and the relay 18 in the on state
The second electromagnetic contactor 1 is
A current from the AC power source flows through 9, the second electromagnetic contactor 19 is energized, and the normally open contact 1 of the contactor 19 is energized.
9' is turned on, the auxiliary heater 11 is connected to the AC power source via the normally open contact 19' and the first and third power terminals 13a, 13c, and the current from the AC power source is passed through the auxiliary heater 11. Auxiliary heater 11
The lower end of the oil tank 1 and the upper end of the pipe 2 are heated, the solidified oil 5 at the lower end of the oil tank 1 is melted by the heat of the auxiliary heater 11, and the discharge valve is set to the open state by the operation rod 3. The oil 5 in the oil tank 1, including the molten oil 5, flows through the pipe 2, and the oil 5 is discharged from the oil tank 1.

Furthermore, when a predetermined period of time has elapsed since the switching connection of the switching piece 14c of the switch 14 to the second contact 14b,
The time-limited normally closed contact 18' of the relay 18 is turned off and the second
The power supply to the electromagnetic contactor 19 is stopped, and the normally open contact 1
9' is turned off, power supply to the auxiliary heater 11 is stopped, and heating of the lower end portion of the oil tank 1 by the auxiliary heater 11 is stopped.

At this time, since the solidification temperature of the oil 5 is approximately 30 to 40°C and the melting temperature is approximately 50 to 60°C, the auxiliary heater 11
The output of the main heater 4 may be extremely small compared to the output of the main heater 4.

The energization time to the auxiliary heater 11 may be about 5 to 10 minutes in order to minimize power consumption, and the energization time to the auxiliary heater 11 may be controlled depending on whether the ambient temperature is high or low. You can also do this.

In addition to the cooking switch 14, an auxiliary heater 11 is also provided.
Of course, another switch may be provided as a changeover switch for connecting the AC power source to the AC power source.

[Effect of idea]

As described above, according to the electric fryer of this invention, the auxiliary heater 11 is wrapped around the lower end of the outer periphery of the oil tank 1, and the auxiliary heater is connected to an AC power source when draining oil. As shown in the figure, there is no need to push the solidified oil into the discharge pipe 2 with a rod or the like, and the solidified oil 5 at the lower end of the oil tank 1 can be melted and the oil can be easily discharged from the oil tank 1. It does not require much time and effort, and the safety of the work can be improved, and the effect is remarkable.

Furthermore, the relay 18 and its time-limited normally closed contact 1
Since the energization to the auxiliary heater 11 is stopped after a predetermined time from the start of energization by 8', power consumption can be suppressed.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the electric fryer of this invention, with Figure 1 being a partially cutaway front view;
FIG. 2 is a wiring diagram, and FIG. 3 is a partially cutaway front view of a conventional electric fryer. 1...Oil tank, 4...Main heater, 5...Cooking oil, 11...Auxiliary heater, 12...Electric fryer, 14...Cooking switch.

Claims (1)

[Scope of utility model registration request] an oil tank into which cooking oil for frying is poured; a main heater disposed near the center of the oil tank to heat the cooking oil in the oil tank; and an auxiliary heater wrapped around a lower end of the outer periphery of the oil tank; and means for connecting the auxiliary heater to an AC power source when draining oil.